enchondroma
noun [ C ] medical specialized uk/en.kɒnˈdrəʊ.mə/ us/ˌen.kənˈdroʊ.mə/
内生软骨瘤（一种良性肿瘤）
a benign tumour (= one that is not likely to cause death) that occurs in bones, especially in the hands and feet
Typically enchondromas cause no symptoms. 典型的内生软骨瘤没有任何症状。